give popups a 'closeOnMove' option. if set to true, the popup will close itself as soon as the map is pan/zoom (move)ed. patch by jrf, euzuro review by elemoine, cr5. (Closes #1726)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@8397 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

examples/popups.html

@@ -36,6 +36,7 @@
                                          new OpenLayers.Size(200,200),
                                          "example popup",
                                          true);
+            popup.closeOnMove = true;
         
             map.addPopup(popup);
         }